Phonograph-horn



E. A. LEU; PHONOGRAPH HORN.

APPLICATION FILED FEB. 51,1920.

Patented 1110.119211.v

2 SHEETS-SHEE 2.

F sgfnl EDWARD A'. LEETQ".

Naw-YORK, N. Y., AssreNoaTo MIRRORPHON TALKING MACIINE COMPANY, Il'C.,`0F BROOKLYN, NEW YORK.

rHoNoeRAPH-HORN.

` To all whom t may concern.'

iBe' it known that I, EDWARD A. Lijn'r, a citizen ofgthe United States,residing at New York, in the county and State of New York, have.invented certain new and useful a Improvements in Phonograph-Horns, of

which the following is a full, clear, and eX-A act specification.'

This invention relates to phonographs, and particularly to horns oramplifying passages therefor, vand has for its object 'to provide a hornand'tone arm Which'will f produce la louder, purer and clearer tone thanprevious constructions, and. at-the same timeto reduce the cost ofmanufacture of .such-parts" so that 'the` phonograph may be l-sold 'tothe public for less money than those now on 'the market.

The invention contemplates the useof ordinary commercial strawboard forthe construction of the horn and tone arm, I having discovered that whenmade of. such mal' terial,l which is non-resonant, rigid and adapted tovibrate, the tone' is .greatly 1mmeant the inability togive outvibrations' proved. Vhile strawboard is preferred, any othernon-resonant, rigid and vibrating -material may be employed Withoutdeparting from my invention. By 4non-resonant is audible tothe human earWhenthe material lis broughtinto contact with sound vibra--j tions.lipusingseveral thicknesses-cime marian with @svi-imacorrigaions..

which occur duringth'e passage of the sound WaVeS 'hIOiflvthginstrumenuthereby pro du'cing a greater volume of sound. By cor--rugating or otherwi'sebreaki'ng upthe'inner surface of the horn andtomarm, 4more echoes are produced during' the passage-otu the soundWaves therethrough, thereby fur.-

ther inceasingthe volume of sound.l lThe construction of the'instrumentofno'n-reso; nant, rigid material, as eXplamed,gives the necessarystrength or intensity to the volumel of sound, vvliile' thedesiredsizeorJfullness,-

which must'b'p'resent with the strength or.intensityin--ordelf'to'produce the -maximum increase i u volume, may beobtained by coating the sound conducting passages of the horn and toneVfarm -with a. resilientsubstance, such as shellac, Wet-glue or liquidbelt dressing ivhich will remain-sticky or Specification of LettersPatent.' *I

III-iii of Fig. 2.

.. rigidity ments.

Patented Dee. 7, 1920.

Application' mea February 5, 1920. serial No. 356,482.

viscid for an indefinite period. A-further and Avery important advantageof the pres Q ent construction is that the entire sound passage is freefrom anything which might audibly vibrate during' the passage of thesound -Waves therethrough, so that the resulting quality of tone is anexact reproduction in timbre of the original voice, instrument,combination of voices or instruments, or Whatever made the soundrecorded ,on the record.

. The invention Will ,now be described in lconnection with theaccompanying drawings, which constitute part of this specification, andthen more specifically defined in the claims at the endof thedescription.

-In theaccompanying drawings, wherein similar reference charactersareused to designate corresponding parts throughout the several viewsFigure lis alfront elevation of a phonograph constructed ina preferredmanner and containing a hornvand tone arm made substantially inaccordance with this invention. i

Fig. -2 is a 'central vertical section taken on the line II-II of Fig.1.

Fig. 3 is a horizontal section on the line Fig.v 4; is a horizontalsection taken on the line IV-IV of FigK 2. f

vFig. 5 is a detailed vertical section of the combined horn and tone armdrawn to a larger scale, and

6 is a section-on the line VI--VI of...

Fig. 4, showing the connection of the soundbox to thetonearm. L In Figs.l to 4, inclusive, of the drawings,-

`1 'designates al cabinet having its Walls, par-. ti'tions and doorspreferably madeof-.straw board,'each of vsaid walls, etc., being made,l

pup oftwo thicknesses of smooth stra vvboard .2 and 3 separated byalayer of corrugated stravvboard 4 in order to obtain the desi-tedcombined with' lightness., 'The number of thicknesses or layers ofstraivf boardfas well as the formation of said lay#4 ers may, however,be varied to suit requlre- The vcabinet lmay be divided about mid- Wayof'its height byl a' transverse horizontal partition: ,thespace belowsaid par-- tition being usedpreferably for' .the storage of records and:for' thai'v lpurpose vfitted with ,resonant,quality/thereof 1V anysuitable form or rack or the shelves 6. Access may be had to saidstorage compartment 7 by means of doors 8 which may be hinged to theopposite sides of the cabinet and fitted with knobs 9. In; theupperportion of the compartment,4 7, just below the partition 5, there areplaced two drawers 10 and '11 which have knobs o1` pulls 12 and maybe"'1`ed for the storage of needles or 10 styliises, sound boxes, or thelike. 'The dra-,wer 11 may be made shallower than the drawer 10, andbehind said drawer 11 may Ibefarranged a box 13, Fig. 2, for holding themotor (not shown). The crank 14 for '15 winding the motor is passedthrough the side of the cabinet and may be unscrewed from the windingspindle in4 the usual way.

The space in the cabinet above the partition 5 is preferably dividedinto two compartments by a partition 15 extendingI rear-- wardly from"the front of the 4cabinet nea-r the top thereof downwardly andrearwardly to the partition 5 near the back of the cabinet. v Thecompartment l16 below and in front of said partition 15' contains theturntable 1T mounted on the projecting spindle 18 of, the motor, andthetone arm 19 which is a part or continuation of the horn 20 and has thesound box 21' attached thereto in anyv suitable manner, as by thetubular extension 22 of said sound box frictionally'engaging a rubbergasket 23 fitted in an opening v24 in the end of the tone arm. Theportion of the tone arm which merges into the horn extends through aslot 25 in the partition 15. The compartment 16 may be closed by doors26 suitably hinged or otherwise -mounted on the cabinet and providedwith hand knobs.

27. lVhen the doors are closed all sound of scraping of the needle onthe record is shut in so that it is not audible to the listener duringthe playing of a record.

' One or more electric lamp bulbs 28 may be supported in the upperportion of the compartment 16, Fig. 2, so as to throw light on theturntable and facilitate'the changing of records and needles. Said lampor'lamps may be supplied with electric current from any suitable sourcein any suitable manner,

as by a dry battery 29 through circuit wires W69,containing..a.sutablesivi-tch31PM-MMM V. 1 As best shown in Fig. 5, thehorn and tone 'iwalls thereof being composed of two thick- V,nesses orlayers 32 and 33 of smooth strawiboard spaced apart by transversemembers- ,534 to form an air chamber 35, and an inside layer ofcorrugated strawboard 36. The inner surfaces of said horn andtone armare gcoated at 37 with the resilient substance already mentioned. Theprovision-of the air chamber or cushion around the horn and ltone armincreases thc desirable resiliency tof saidA parts as (yelliis yimprovesthe non- .Xarm are made integral or in one piece, the

The horn and tone arm are supported to swing freely both vertically andhorizontally by a double hinge compensating .device .38. comprisingvertical members 39 and 40 hinged together by a flexible strip of cloth'41, or the like, a pair of horizontal members- 42 and 43 hingedtogether by a similar ilexible strip 44, and a cradle 45 embracing thelower portion of the horn. The vertical' member 39 is secured to theback of the cabi-1 net in the compartment '46 back of the partition 15,while the horizontal member 43 carries the horn embracing cradle 45. Thevertical member 40 and horizontal member 42 are rigidly connectedtogetherpreferably by the diverging arms 47. 'A resilient support48,`preferably a coiled'spring, .is attached at one end'to the mouth ofthe horn and at the otherend to the vertical member 4() for yieldinglyretaining the uppery end portion of said horn-in proper position and lso that it may follow the movements of the lower portion thereof and thetone arm on the double hinge support.

The compartment'46 may have additional walls 49 within the main walls ofthe cabinet 1 to increase the rigidity and resiliency ofthiscompartment.. In the walls of the cabinet above said additionalwalls 49 openings 50are formed for the escape ofthe sound waves, andsaid openings are preferably covered. on the inside with silk as at 51,Fig. 2. A piece of similar material 52 is also 'stretchedacross thetopof the compartment v 46 above the openings 50. Said 'silk coveringsare designed for masking the horn and excluding dust.

- lVithin the top of the compartment 46 there is a ledge 53 to' which adome shaped cover 54 is hinged at 55 and on-which it is supported whenclosed. The silk piece 52 may also be attached to this ledge, preferablyto the under edge thereof.. At one side ofv said ledge a rack 550 may beprovided to c0- operate with a prop 56 pivoted to the cover andadaptedto be adjusted with its free end in any one of the notches of the rackfor supporting the cover at any desired angle as suggested in dottedlines in,Fig.`2. .In Fig. 4, 57 indicates the usual speed controllinglever for the motor, said lever projecting from bei low the edge of theturntable.

The cabinet structure and the compensating doublehinge support for thehorn are claimed in 4separate'applications filed herewith.

Having thus described my invention, what l'. claim as new and desire tosecure by Letters Patent of the United States is i; 1. A phonograph hornhaving a smooth wall and a corrugated wall arranged with the ridgesbetween its corrugations against 1,551,164 l e" I rugated wall arrangedwith the ridges bephonographs having spaced inner and outer tween itsoorrugations against the inner surwalls and a corrugated lining for theinner face of the inner smooth Wall. l Wall.

3. A phonograph horn having spaced 6. An integral horn and 'tone arm forf15if 5 inner and outer walls, and a corrugated linphonographs having avsmooth Wall and a ing for the inner wall. corrugated wall arranged withthe ridges b e- 4. A phonograph horn having spaced intween itscorrugations aains't the inner surner and outer walls, and a corrugatedlining face of said smooth wa Y v for the inner wall coated witha-resilient su'b- In testimony whereof I have signed my' 20 10 stancefor the purpose speciied. name to this specification. 5. An integralhorn` and tone arm for EDW. A. LEET.

